Water temperature in Ichihara

This data the coastal Ichihara sea water temperature today, tomorrow and the upcoming days. Besides, you can also get information about the weather and surf forecast, as well as the data on sunrise / sunset and moonrise / moonset at a given point on any given day.

Current sea temperature in Ichihara

Water temperature in Ichihara today is 29°C. Based on our historical data over a period of ten years, the warmest water in this day in Ichihara was recorded in 2023 and was 29.2°C, and the coldest was recorded in 2009 at 24.3°C. Sea water temperature in Ichihara is expected to drop to 25.8°C in the next 10 days. September average water temperature in Ichihara is 25.5°C, the minimum temperature is 22.5°C, and the maximum is 29.9°C.

The swimming season in Ichihara lasts from June to October. During those months, Ichihara water temperature does not drop below 20°C and therefore suitable for comfortable swimming. The average water temperature in Ichihara in winter reaches 13.7°C, in spring 15.9°C, in summer the average temperature rises to 25°C, and in autumn it is 22°C.

Ichihara water temperature now

The sea salinity in Ichihara is 30.89‰, and the average salinity of the World Ocean is 35‰.

Surf Forecast in Ichihara for today

Another important indicators for a comfortable holiday on the beach are the presence and height of the waves, as well as the speed and direction of the wind. Please find below data on the swell size for Ichihara. We calculate the swell size based on the mean wave height (trough to crest) of each third highest wave. For more information on surf forecasts for the next ten days, please visit sea state forecast Ichihara. Data in table shown for 6 September 2025, time in GMT 0 format (you can change the time zone on the sea state forecast page)

Surf report in Ichihara

Ichihara weather forecast

Current temperature and weather

Data in a table show Ichihara temperature today (6 September 2025). For more information and forecast for a few days, go to the weather forecast Ichihara.

0-3 h	3-6 h	6-9 h	9-12 h
25.4°C	24.9°C	24.4°C	23.7°C

12-15 h	15-18 h	18-21 h	21-24 h
24.2°C	23.9°C	23.6°C	23.8°C

Ichihara water temperature by month

These figures shows the average, minimum and maximum monthly sea temperature in Ichihara. In addition to the table values, the graph below displays of changes average surface temperature during the year. Values are calculated based on the data over the past 10 years. Using them, you can check the water temperature in Ichihara on any day of this period that interests you. Click on the month link and you will see a table for each day, or alternatively you can view the temperature curve of the month and select 2 different years you want to compare, either in a table or as a curve

Chart monthly average water temperature in Ichihara

The nearest beaches and cities from Ichihara with the water temperature today, as well as the air temperature and the state of the weather during the day and the average wave height for today

	Water	Weather		Wave
Narashino	28.9°C	24°C		0.61 m
Ichikawa	28.6°C	24°C		0.61 m
Kisarazu	27.3°C	24°C		0.92 m
Shinagawa Ku	28.1°C	25°C		0.69 m
Kawasaki	27.7°C	25°C		0.88 m
Futtsu	27.1°C	23°C		0.97 m
Katsuura	27.2°C	24°C		1.81 m
Yokosuka	27°C	24°C		1.3 m
Kawaguchi	27°C	23°C		1.7 m
Hayama	27°C	25°C		1.3 m

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Our report for Ichihara is compiled using satellite data together with in-situ observations to get the most reliable daily data of sea surface temperatures, surf forecasts, current temperatures and weather forecasts.